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February 21st, 2024 17:16

how do I run Power Supply Unit Self Test?

How come I run Power Supply Unit Self Test, my power supply has no BIST button, I'm using my Optiplex 5080 mini tower

7 Technologist

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10.3K Posts

February 21st, 2024 18:18

Examples of a power supply unit without the built-in self-test button

power supply without the BIST button
Figure 5: Example of a power supply without the BIST button.

How to run self-test without the button on the PSU

  1. Turn off the computer.
  2. Disconnect the power cable from the PSU, and wait for 15 seconds.
  3. After 15 seconds, connect the power cable to the computer.
  4. The LED light turns on for 3 seconds and then turns off.
    1. If the BIST LED turns on, the power supply is delivering power to the computer.
    2. If the BIST LED does not turn on or the PSU fan does not spin correctly, the power supply is not delivering power to the computer. Disconnect and reconnect the power cable to computer and try again.
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